audio/audio_template.h

   1 /*
   2  * QEMU Audio subsystem header
   3  *
   4  * Copyright (c) 2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifdef DAC
  26 #define NAME "playback"
  27 #define HWBUF hw->mix_buf
  28 #define TYPE out
  29 #define HW HWVoiceOut
  30 #define SW SWVoiceOut
  31 #else
  32 #define NAME "capture"
  33 #define TYPE in
  34 #define HW HWVoiceIn
  35 #define SW SWVoiceIn
  36 #define HWBUF hw->conv_buf
  37 #endif
  38
  39 static void glue (audio_init_nb_voices_, TYPE) (struct audio_driver *drv)
  40 {
  41     AudioState *s = &glob_audio_state;
  42     int max_voices = glue (drv->max_voices_, TYPE);
  43     int voice_size = glue (drv->voice_size_, TYPE);
  44
  45     if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
  46         if (!max_voices) {
  47 #ifdef DAC
  48             dolog ("Driver `%s' does not support " NAME "\n", drv->name);
  49 #endif
  50         }
  51         else {
  52             dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
  53                    drv->name,
  54                    glue (s->nb_hw_voices_, TYPE),
  55                    max_voices);
  56         }
  57         glue (s->nb_hw_voices_, TYPE) = max_voices;
  58     }
  59
  60     if (audio_bug (AUDIO_FUNC, !voice_size && max_voices)) {
  61         dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
  62                drv->name, max_voices);
  63         glue (s->nb_hw_voices_, TYPE) = 0;
  64     }
  65
  66     if (audio_bug (AUDIO_FUNC, voice_size && !max_voices)) {
  67         dolog ("drv=`%s' voice_size=%d max_voices=0\n",
  68                drv->name, voice_size);
  69     }
  70 }
  71
  72 static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
  73 {
  74     if (HWBUF) {
  75         g_free (HWBUF);
  76     }
  77
  78     HWBUF = NULL;
  79 }
  80
  81 static int glue (audio_pcm_hw_alloc_resources_, TYPE) (HW *hw)
  82 {
  83     HWBUF = audio_calloc (AUDIO_FUNC, hw->samples, sizeof (struct st_sample));
  84     if (!HWBUF) {
  85         dolog ("Could not allocate " NAME " buffer (%d samples)\n",
  86                hw->samples);
  87         return -1;
  88     }
  89
  90     return 0;
  91 }
  92
  93 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
  94 {
  95     if (sw->buf) {
  96         g_free (sw->buf);
  97     }
  98
  99     if (sw->rate) {
 100         st_rate_stop (sw->rate);
 101     }
 102
 103     sw->buf = NULL;
 104     sw->rate = NULL;
 105 }
 106
 107 static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
 108 {
 109     int samples;
 110
 111     samples = ((int64_t) sw->hw->samples << 32) / sw->ratio;
 112
 113     sw->buf = audio_calloc (AUDIO_FUNC, samples, sizeof (struct st_sample));
 114     if (!sw->buf) {
 115         dolog ("Could not allocate buffer for `%s' (%d samples)\n",
 116                SW_NAME (sw), samples);
 117         return -1;
 118     }
 119
 120 #ifdef DAC
 121     sw->rate = st_rate_start (sw->info.freq, sw->hw->info.freq);
 122 #else
 123     sw->rate = st_rate_start (sw->hw->info.freq, sw->info.freq);
 124 #endif
 125     if (!sw->rate) {
 126         g_free (sw->buf);
 127         sw->buf = NULL;
 128         return -1;
 129     }
 130     return 0;
 131 }
 132
 133 static int glue (audio_pcm_sw_init_, TYPE) (
 134     SW *sw,
 135     HW *hw,
 136     const char *name,
 137     struct audsettings *as
 138     )
 139 {
 140     int err;
 141
 142     audio_pcm_init_info (&sw->info, as);
 143     sw->hw = hw;
 144     sw->active = 0;
 145 #ifdef DAC
 146     sw->ratio = ((int64_t) sw->hw->info.freq << 32) / sw->info.freq;
 147     sw->total_hw_samples_mixed = 0;
 148     sw->empty = 1;
 149 #else
 150     sw->ratio = ((int64_t) sw->info.freq << 32) / sw->hw->info.freq;
 151 #endif
 152
 153 #ifdef DAC
 154     sw->conv = mixeng_conv
 155 #else
 156     sw->clip = mixeng_clip
 157 #endif
 158         [sw->info.nchannels == 2]
 159         [sw->info.sign]
 160         [sw->info.swap_endianness]
 161         [audio_bits_to_index (sw->info.bits)];
 162
 163     sw->name = g_strdup (name);
 164     err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
 165     if (err) {
 166         g_free (sw->name);
 167         sw->name = NULL;
 168     }
 169     return err;
 170 }
 171
 172 static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
 173 {
 174     glue (audio_pcm_sw_free_resources_, TYPE) (sw);
 175     if (sw->name) {
 176         g_free (sw->name);
 177         sw->name = NULL;
 178     }
 179 }
 180
 181 static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
 182 {
 183     QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
 184 }
 185
 186 static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
 187 {
 188     QLIST_REMOVE (sw, entries);
 189 }
 190
 191 static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
 192 {
 193     AudioState *s = &glob_audio_state;
 194     HW *hw = *hwp;
 195
 196     if (!hw->sw_head.lh_first) {
 197 #ifdef DAC
 198         audio_detach_capture (hw);
 199 #endif
 200         QLIST_REMOVE (hw, entries);
 201         glue (s->nb_hw_voices_, TYPE) += 1;
 202         glue (audio_pcm_hw_free_resources_ ,TYPE) (hw);
 203         glue (hw->pcm_ops->fini_, TYPE) (hw);
 204         g_free (hw);
 205         *hwp = NULL;
 206     }
 207 }
 208
 209 static HW *glue (audio_pcm_hw_find_any_, TYPE) (HW *hw)
 210 {
 211     AudioState *s = &glob_audio_state;
 212     return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
 213 }
 214
 215 static HW *glue (audio_pcm_hw_find_any_enabled_, TYPE) (HW *hw)
 216 {
 217     while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
 218         if (hw->enabled) {
 219             return hw;
 220         }
 221     }
 222     return NULL;
 223 }
 224
 225 static HW *glue (audio_pcm_hw_find_specific_, TYPE) (
 226     HW *hw,
 227     struct audsettings *as
 228     )
 229 {
 230     while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
 231         if (audio_pcm_info_eq (&hw->info, as)) {
 232             return hw;
 233         }
 234     }
 235     return NULL;
 236 }
 237
 238 static HW *glue (audio_pcm_hw_add_new_, TYPE) (struct audsettings *as)
 239 {
 240     HW *hw;
 241     AudioState *s = &glob_audio_state;
 242     struct audio_driver *drv = s->drv;
 243
 244     if (!glue (s->nb_hw_voices_, TYPE)) {
 245         return NULL;
 246     }
 247
 248     if (audio_bug (AUDIO_FUNC, !drv)) {
 249         dolog ("No host audio driver\n");
 250         return NULL;
 251     }
 252
 253     if (audio_bug (AUDIO_FUNC, !drv->pcm_ops)) {
 254         dolog ("Host audio driver without pcm_ops\n");
 255         return NULL;
 256     }
 257
 258     hw = audio_calloc (AUDIO_FUNC, 1, glue (drv->voice_size_, TYPE));
 259     if (!hw) {
 260         dolog ("Can not allocate voice `%s' size %d\n",
 261                drv->name, glue (drv->voice_size_, TYPE));
 262         return NULL;
 263     }
 264
 265     hw->pcm_ops = drv->pcm_ops;
 266     hw->ctl_caps = drv->ctl_caps;
 267
 268     QLIST_INIT (&hw->sw_head);
 269 #ifdef DAC
 270     QLIST_INIT (&hw->cap_head);
 271 #endif
 272     if (glue (hw->pcm_ops->init_, TYPE) (hw, as)) {
 273         goto err0;
 274     }
 275
 276     if (audio_bug (AUDIO_FUNC, hw->samples <= 0)) {
 277         dolog ("hw->samples=%d\n", hw->samples);
 278         goto err1;
 279     }
 280
 281 #ifdef DAC
 282     hw->clip = mixeng_clip
 283 #else
 284     hw->conv = mixeng_conv
 285 #endif
 286         [hw->info.nchannels == 2]
 287         [hw->info.sign]
 288         [hw->info.swap_endianness]
 289         [audio_bits_to_index (hw->info.bits)];
 290
 291     if (glue (audio_pcm_hw_alloc_resources_, TYPE) (hw)) {
 292         goto err1;
 293     }
 294
 295     QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
 296     glue (s->nb_hw_voices_, TYPE) -= 1;
 297 #ifdef DAC
 298     audio_attach_capture (hw);
 299 #endif
 300     return hw;
 301
 302  err1:
 303     glue (hw->pcm_ops->fini_, TYPE) (hw);
 304  err0:
 305     g_free (hw);
 306     return NULL;
 307 }
 308
 309 static HW *glue (audio_pcm_hw_add_, TYPE) (struct audsettings *as)
 310 {
 311     HW *hw;
 312
 313     if (glue (conf.fixed_, TYPE).enabled && glue (conf.fixed_, TYPE).greedy) {
 314         hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
 315         if (hw) {
 316             return hw;
 317         }
 318     }
 319
 320     hw = glue (audio_pcm_hw_find_specific_, TYPE) (NULL, as);
 321     if (hw) {
 322         return hw;
 323     }
 324
 325     hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
 326     if (hw) {
 327         return hw;
 328     }
 329
 330     return glue (audio_pcm_hw_find_any_, TYPE) (NULL);
 331 }
 332
 333 static SW *glue (audio_pcm_create_voice_pair_, TYPE) (
 334     const char *sw_name,
 335     struct audsettings *as
 336     )
 337 {
 338     SW *sw;
 339     HW *hw;
 340     struct audsettings hw_as;
 341
 342     if (glue (conf.fixed_, TYPE).enabled) {
 343         hw_as = glue (conf.fixed_, TYPE).settings;
 344     }
 345     else {
 346         hw_as = *as;
 347     }
 348
 349     sw = audio_calloc (AUDIO_FUNC, 1, sizeof (*sw));
 350     if (!sw) {
 351         dolog ("Could not allocate soft voice `%s' (%zu bytes)\n",
 352                sw_name ? sw_name : "unknown", sizeof (*sw));
 353         goto err1;
 354     }
 355
 356     hw = glue (audio_pcm_hw_add_, TYPE) (&hw_as);
 357     if (!hw) {
 358         goto err2;
 359     }
 360
 361     glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
 362
 363     if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
 364         goto err3;
 365     }
 366
 367     return sw;
 368
 369 err3:
 370     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 371     glue (audio_pcm_hw_gc_, TYPE) (&hw);
 372 err2:
 373     g_free (sw);
 374 err1:
 375     return NULL;
 376 }
 377
 378 static void glue (audio_close_, TYPE) (SW *sw)
 379 {
 380     glue (audio_pcm_sw_fini_, TYPE) (sw);
 381     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 382     glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
 383     g_free (sw);
 384 }
 385
 386 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
 387 {
 388     if (sw) {
 389         if (audio_bug (AUDIO_FUNC, !card)) {
 390             dolog ("card=%p\n", card);
 391             return;
 392         }
 393
 394         glue (audio_close_, TYPE) (sw);
 395     }
 396 }
 397
 398 SW *glue (AUD_open_, TYPE) (
 399     QEMUSoundCard *card,
 400     SW *sw,
 401     const char *name,
 402     void *callback_opaque ,
 403     audio_callback_fn callback_fn,
 404     struct audsettings *as
 405     )
 406 {
 407     AudioState *s = &glob_audio_state;
 408 #ifdef DAC
 409     int live = 0;
 410     SW *old_sw = NULL;
 411 #endif
 412
 413     ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
 414             name, as->freq, as->nchannels, as->fmt);
 415
 416     if (audio_bug (AUDIO_FUNC, !card || !name || !callback_fn || !as)) {
 417         dolog ("card=%p name=%p callback_fn=%p as=%p\n",
 418                card, name, callback_fn, as);
 419         goto fail;
 420     }
 421
 422     if (audio_bug (AUDIO_FUNC, audio_validate_settings (as))) {
 423         audio_print_settings (as);
 424         goto fail;
 425     }
 426
 427     if (audio_bug (AUDIO_FUNC, !s->drv)) {
 428         dolog ("Can not open `%s' (no host audio driver)\n", name);
 429         goto fail;
 430     }
 431
 432     if (sw && audio_pcm_info_eq (&sw->info, as)) {
 433         return sw;
 434     }
 435
 436 #ifdef DAC
 437     if (conf.plive && sw && (!sw->active && !sw->empty)) {
 438         live = sw->total_hw_samples_mixed;
 439
 440 #ifdef DEBUG_PLIVE
 441         dolog ("Replacing voice %s with %d live samples\n", SW_NAME (sw), live);
 442         dolog ("Old %s freq %d, bits %d, channels %d\n",
 443                SW_NAME (sw), sw->info.freq, sw->info.bits, sw->info.nchannels);
 444         dolog ("New %s freq %d, bits %d, channels %d\n",
 445                name,
 446                as->freq,
 447                (as->fmt == AUD_FMT_S16 || as->fmt == AUD_FMT_U16) ? 16 : 8,
 448                as->nchannels);
 449 #endif
 450
 451         if (live) {
 452             old_sw = sw;
 453             old_sw->callback.fn = NULL;
 454             sw = NULL;
 455         }
 456     }
 457 #endif
 458
 459     if (!glue (conf.fixed_, TYPE).enabled && sw) {
 460         glue (AUD_close_, TYPE) (card, sw);
 461         sw = NULL;
 462     }
 463
 464     if (sw) {
 465         HW *hw = sw->hw;
 466
 467         if (!hw) {
 468             dolog ("Internal logic error voice `%s' has no hardware store\n",
 469                    SW_NAME (sw));
 470             goto fail;
 471         }
 472
 473         glue (audio_pcm_sw_fini_, TYPE) (sw);
 474         if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
 475             goto fail;
 476         }
 477     }
 478     else {
 479         sw = glue (audio_pcm_create_voice_pair_, TYPE) (name, as);
 480         if (!sw) {
 481             dolog ("Failed to create voice `%s'\n", name);
 482             return NULL;
 483         }
 484     }
 485
 486     sw->card = card;
 487     sw->vol = nominal_volume;
 488     sw->callback.fn = callback_fn;
 489     sw->callback.opaque = callback_opaque;
 490
 491 #ifdef DAC
 492     if (live) {
 493         int mixed =
 494             (live << old_sw->info.shift)
 495             * old_sw->info.bytes_per_second
 496             / sw->info.bytes_per_second;
 497
 498 #ifdef DEBUG_PLIVE
 499         dolog ("Silence will be mixed %d\n", mixed);
 500 #endif
 501         sw->total_hw_samples_mixed += mixed;
 502     }
 503 #endif
 504
 505 #ifdef DEBUG_AUDIO
 506     dolog ("%s\n", name);
 507     audio_pcm_print_info ("hw", &sw->hw->info);
 508     audio_pcm_print_info ("sw", &sw->info);
 509 #endif
 510
 511     return sw;
 512
 513  fail:
 514     glue (AUD_close_, TYPE) (card, sw);
 515     return NULL;
 516 }
 517
 518 int glue (AUD_is_active_, TYPE) (SW *sw)
 519 {
 520     return sw ? sw->active : 0;
 521 }
 522
 523 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 524 {
 525     if (!sw) {
 526         return;
 527     }
 528
 529     ts->old_ts = sw->hw->ts_helper;
 530 }
 531
 532 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 533 {
 534     uint64_t delta, cur_ts, old_ts;
 535
 536     if (!sw) {
 537         return 0;
 538     }
 539
 540     cur_ts = sw->hw->ts_helper;
 541     old_ts = ts->old_ts;
 542     /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
 543
 544     if (cur_ts >= old_ts) {
 545         delta = cur_ts - old_ts;
 546     }
 547     else {
 548         delta = UINT64_MAX - old_ts + cur_ts;
 549     }
 550
 551     if (!delta) {
 552         return 0;
 553     }
 554
 555     return muldiv64 (delta, sw->hw->info.freq, 1000000);
 556 }
 557
 558 #undef TYPE
 559 #undef HW
 560 #undef SW
 561 #undef HWBUF
 562 #undef NAME